i am looking into supercharging my 91 z28 tpi. is it anygood? would it give me alot of ponies or is it just a dud? does it work well with the tpi setup? please let me know because i don't want to drop 3 grand on somethin that wont give me substancial power and torque increases. thanks

 

Force feeding the TPI is the best way to get it to turn some RPM's.

Ive never had a S/C TPI but ive heard it runs well.

 

LoL @ your screen name

Supercharging would be a great idea

 

TPI setups take very well to boost, just don't overdo it. You don't want to spend 3 grand on a supercharger and then have to shell out for a new engine. At most the engine will safely handle about 8 lbs of boost. But even then be on the lookout for detonation. That will ruin your little project very quickly.

But from what I have seen 8 lbs will give you roughly about another 100 ft-lbs and another 200 horses.

 

Thats the name of the car

 

so is it safe to run 8lbs of boost in a stock tpi setup? i only have a cam in it.

 

I wouldn't run 8psi on a TPI

iron heads for 1 too much effective compression ration,

I run 8psi on a 95 LT1 camaro and it killed the stock bottom end, car only had 80,000km and ran boost about 10,000km

5 psi would be more reasonable

 

That's because the Powdered Metal Rods in a Stock LT-1 aren't really all that great. The first 2 years of the LT-1 had Forged Rods and then GM went to the Powdered Metal Rods for 95 because they were cheaper to make. I had one in my N/A stock motor snap in 2 places while cruise'n at 75mph on the highway. Also my motor had just turned over to 58k miles. There was a slight lean issue in that cylinder.

So, his rods should be up to the job and hold out just fine.

 

killed the bottom end due to excessive bearing clearance,
causing low oil pressure

 

L98's have less compression than an LT1. And you can do it but you have to be careful of detonation b/c of the increased heat from the iron heads. Most people run 6 lbs.

 

thank you! you guys are awsome! so for heads then, any ideas??

 

Aluminum would be best, can handle higher compression with out detonation

 

ITS FUNNY THAT I CAME ACROSS THIS SUBJECT... WELL I CURRENTLY HAVE A 91 Z28 WITH A PROCHAGER SUPERCHAGER ON AND I WILL TELL YOU ALL THE IN'S AND OUTS IF YOU LIKE,
IAM A LITTLE TO NEW THIS POSTING REPLIES AND STUFF AND PLUS IAM NOT ALWAYS ONLINE SO IF YOU LIKE YOU CAN REACH ME ON MY REGULAR EMAIL IF I DON'T IT HERE IN TIME
BLKZDRGN@HOTMAIL.COM

 

now my next question is what alum heads should i get?

 

GM Fast Burn.